Fix bug which caused an infinite recursion when testing whether two matrices were equal.
Fix bug which caused an infinite recursion when testing whether two matrices were equal.

EuropeanSpallationSource/openxal,EuropeanSpallationSource/openxal,EuropeanSpallationSource/openxal,openxal/openxal,openxal/openxal,openxal/openxal,luxiaohan/openxal-csns-luxh,luxiaohan/openxal-csns-luxh,EuropeanSpallationSource/openxal,luxiaohan/openxal-csns-luxh,EuropeanSpallationSource/openxal,openxal/openxal,luxiaohan/openxal-csns-luxh,openxal/openxal